To get DAI you need Ether as a collateral. That would mean that DAI is an asset-backed stablecoin. Backed and collateralized by Ether.
I like BAT a lot. I included BAT in my list of best cryptocurrencies to invest in in 2020.
The article that you linked about BAT is excellent!
RE: Digital Gold Prevails In An Era Of Failed Stablecoins